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Int J Sports Med. 1994 Aug;15(6):319-24.

Immunological status of competitive cyclists before and after the training season.

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1
Microbiology and Virology Center, Polish Academy of Sciences.

Abstract

The total number of leucocytes, T lymphocyte subsets, mitogen induced proliferation of lymphocytes, Il-2 generation, adherence capacity and chemiluminescence of granulocytes were measured and a leukergy test performed in fifteen young cyclists. The investigations were carried out at rest at the beginning of a training season and after six months of intensive training and a racing season, cycling approximately 500 km a week. Baseline values of the tested immune parameters were within the range observed in 16 non-trained healthy controls except significantly increased non stimulated neutrophil chemiluminescence. The second cyclo-ergometer test in August showed a marked improvement in the performance capacity of the cyclists. Significant decrease in absolute numbers of CD3+ and CD4+ cells, diminished IL-2 generation and fMLP and PMA stimulated chemiluminescence of neutrophils were noted. Surprisingly, a marked increase in lymphocyte proliferation induced by PHA and anti-CD3 MoAb and normalisation in non stimulated neutrophil chemiluminescence were also observed at rest after the training season. We conclude that long-lasting intensive training may result in significant alterations in lymphocyte number and composition and in neutrophil oxidative burst capacity, but their actual significance for immunity is seen controversially.

PMID:
7822070
DOI:
10.1055/s-2007-1021067
[Indexed for MEDLINE]
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